title: H+-type and OH- -type biological protonic semiconductors and complementary devices.
abstract: Proton conduction is essential in biological systems. Oxidative phosphorylation in mitochondria, proton pumping in bacteriorhodopsin, and uncoupling membrane potentials by the antibiotic Gramicidin are examples. In these systems, H(+) hop along chains of hydrogen bonds between water molecules and hydrophilic residues - proton wires. These wires also support the transport of OH(-) as proton holes. Discriminating between H(+) and OH(-) transport has been elusive. Here, H(+) and OH(-) transport is achieved in polysaccharide- based proton wires and devices. A H(+)- OH(-) junction with rectifying behaviour and H(+)-type and OH(-)-type complementary field effect transistors are demonstrated. We describe these devices with a model that relates H(+) and OH(-) to electron and hole transport in semiconductors. In turn, the model developed for these devices may provide additional insights into proton conduction in biological systems.
authors.affiliation: Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA.
authors.forename: Yingxin
authors.initials: Y
authors.lastname: Deng
authors.forename: Erik
authors.initials: E
authors.lastname: Josberger
authors.forename: Jungho
authors.initials: J
authors.lastname: Jin
authors.forename: Anita Fadavi
authors.initials: AF
authors.lastname: Roudsari
authors.forename: Anita Fadavi
authors.initials: AF
authors.lastname: Rousdari
authors.forename: Brett A
authors.initials: BA
authors.lastname: Helms
authors.forename: Chao
authors.initials: C
authors.lastname: Zhong
authors.forename: M P
authors.initials: MP
authors.lastname: Anantram
authors.forename: Marco
authors.initials: M
authors.lastname: Rolandi
mesh_terms: D001692:Biological Transport; D048271:Chitosan / Q000737:chemistry; D003198:Computer Simulation; D006860:Hydrogen Bonding; D006868:Hydrolysis; D006878:Hydroxides; D008298:Maleates / Q000737:chemistry; D008564:Membrane Potentials; D008958:Models, Molecular; D011392:Proline / Q000737:chemistry; D011522:Protons; D012666:Semiconductors; D014867:Water / Q000737:chemistry
chemical_list: D006878:Hydroxides; D008298:Maleates; D011522:Protons; D014867:Water; D048271:Chitosan; C031356:hydroxide ion; C030272:maleic acid; D011392:Proline